The first is from a Latin manuscript on arithmetic, [584] of which the original was written at Paris in 1424 by Rollandus, a Portuguese physician, who prepared the work at the command of John of Lancaster, Duke of Bedford, at one time Protector of England and Regent of France, to whom the work is dedicated.

The only important fact which I have found with regard to de Graunson ” aside from those mentioned in Romania XIX ” is an indenture made apparently in 48 Edward III, between Otz de Granson chivaler, and John of Lancaster.